修饰的多壁碳纳米管糊电极用于生物与制药样品中苄丙酮香豆素电催化氧化和测定

doi:10.1016/S1872-2067(15)61039-7

催化学报 ›› 2016, Vol. 37 ›› Issue (3): 436-445.DOI: 10.1016/S1872-2067(15)61039-7

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修饰的多壁碳纳米管糊电极用于生物与制药样品中苄丙酮香豆素电催化氧化和测定

Masoumeh Taei, Fardin Abedi

帕亚莫·努尔大学化学系, 德黑兰19395-4697, 伊朗

收稿日期:2015-09-12 修回日期:2016-01-08 出版日期:2016-02-29 发布日期:2016-02-29
通讯作者: Masoumeh Taei

New modified multiwalled carbon nanotubes paste electrode for electrocatalytic oxidation and determination of warfarin in biological and pharmaceutical samples

Masoumeh Taei, Fardin Abedi

Chemistry Department, Payame Noor University, Tehran 19395-4697, Iran

Received:2015-09-12 Revised:2016-01-08 Online:2016-02-29 Published:2016-02-29
Contact: Masoumeh Taei

摘要/Abstract

摘要：

采用一种简单灵敏的方法开发了在多壁碳纳米管修饰的ZnCrFeO₄糊电极(MWCNTs/ZnCrFeO₄/CPE)表面测定苄丙酮香豆素的新型传感器. 运用循环伏安法、差示脉冲伏安法、计时电流法和电化学阻抗谱考察了该化学修饰电极上苄丙酮香豆素的电化学性能. 结果表明, MWCNTs/ZnCrFeO₄/CPE电极对苄丙酮香豆素氧化表现出较高的电催化活性, 在pH = 4时, 产生峰值氧化电流约0.97 vs Ag/AgCl参比电极. 当苄丙酮香豆素浓度在0.02-920.0 μmol/L范围内, 该峰电流与其呈线性关系, 检测极限(3σ)为0.003 μmol/L. 另外, 运用差示脉冲伏安法测定了MWCNTs/ZnCrFeO₄/CPE电极上苄丙酮香豆素的催化反应速率常数和扩散系数.

关键词: ZnCrFeO₄, 多壁碳纳米管, 苄丙酮香豆素, 电化学阻抗谱, 糊电极

Abstract:

A novel sensor for the determination of warfarin based on a simple and sensitive method was developed on multiwalled-carbon-nanotube modified ZnCrFeO₄ carbon paste electrodes (MWCNT/ZnCrFeO₄/CPEs). Cyclic voltammetry, differential pulse voltammetry, chronoamperometry, and electrochemical impedance spectroscopy were used to investigate the electrochemical behavior of warfarin at the chemically modified electrode. According to the results, MWCNT/ZnCrFeO₄/CPEs showed high electrocatalytic activity for warfarin oxidation, producing a sharp oxidation peak current at about +0.97 vs Ag/AgCl reference electrode at pH = 4.0. The peak current was linearly dependent on warfarin concentration over the range of 0.02-920.0 μmol/L with a detection limit of 0.003 μmol/L. In addition, chronoamperometry was also used to determine warfarin's catalytic rate constant and diffusion coefficient at MWCNT/ZnCrFeO₄/CPEs.

Key words: ZnCrFeO₄Multiwalled carbon nanotubes, Warfarin, Electrochemical impedance spectroscopy, Paste electrode

Masoumeh Taei, Fardin Abedi. 修饰的多壁碳纳米管糊电极用于生物与制药样品中苄丙酮香豆素电催化氧化和测定[J]. 催化学报, 2016, 37(3): 436-445.

Masoumeh Taei, Fardin Abedi. New modified multiwalled carbon nanotubes paste electrode for electrocatalytic oxidation and determination of warfarin in biological and pharmaceutical samples[J]. Chinese Journal of Catalysis, 2016, 37(3): 436-445.

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修饰的多壁碳纳米管糊电极用于生物与制药样品中苄丙酮香豆素电催化氧化和测定

New modified multiwalled carbon nanotubes paste electrode for electrocatalytic oxidation and determination of warfarin in biological and pharmaceutical samples

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